Bathtub



FIG. 1 is a left front elevational view of a bathtub showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left rear elevational view thereof, the right rear being a mirror image of the left rear;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a cross sectional view taken on line 5--5 of FIG. 2; and,

FIG. 6 is a cross sectional view taken on line 6--6 of FIG. 2. 

The ornamental design for a bathtub, as shown and described. 